15 Nutrients Every Runner Needs

When you want to run strong, your diet can play an important role in reaching your goals. That means ditching the salty snacks and pumping up your meals with wholesome, fresh foods—the fruits, vegetables, meats, whole grains, and legumes you've come to love. Here, we provide 15 nutrients health-minded runners should pay attention to and how to get more of them in your diet deliciously.

Vitamin B12Use it for: Helping your body break down the fat and protein you eat for the energy you need to get through a workout. It also assists in forming new red blood cells, which carry oxygen through the body. Deficiency can lead to a type of anemia—and fatigue.How much? 2.4 micrograms/day (men and women). Getting more than the RDA—i.e. supplements or shots—won't net you more energy.How to get it: A 3-ounce burger packs almost your entire daily value with 2.2 micrograms of B12. Other sources: milk and fortified foods (like breads and cereals).

Calcium

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Use it for: Supporting bone and teeth health—that's where 99% of your calcium is stored. It's also an electrolyte, aiding muscle and blood vessel contraction.How much? 1,000 milligrams/dayHow to get it: One cup of milk packs about 30% of your daily value, although fortified non-dairy drinks (almond, cashew milk) offer a more impressive 45%. Other sources: tofu, spinach, and chia seeds.

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CholineUse it for: Metabolism, and helping your body form a specific neurotransmitter necessary for good muscle control, memory, and focus. Sufficient choline can increase your time to fatigue as well, says Lisa Dorfman, MS, RD, author of Legally Lean: Sports Nutrition Strategies for Optimal Health & Performance.How much? Men, 550 milligrams/day; women 425 milligrams/day. However, about half of the population may have a gene variant that decreases your ability to absorb the nutrient, says Dorfman. Signs are lethargy and weight loss—in that case, you may need to eat more choline-packed foods.How to get it: One whole egg (the yolk is the sweet spot) contains 610 milligrams. Other sources: wheat germ and turkey.

Vitamin C

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Use it for: Building collagen in your skin to keep it plump and smooth. Vitamin C also acts as an antioxidant to sop up the free radicals you're exposed to on a run, like pollution. Eaten with non-animal sources of iron (like lentils), C will aid absorption of the energy mineral.How much? Men, 90 milligrams/day; women, 75 milligrams/day.How to get it: Two small kiwis offer over 100% of your daily quota. Other sources: Strawberries, red peppers.

Vitamin DUse it for: Reducing injuries. "A 2012 study found that when vitamin D was low in a group of runners, they had a biomarker for increased inflammation," says sports dietitian Linda Samuels, MS, RD. Low D can increase your risk for inflammation-related muscle injury.How much? 600 IU/day (men and women). Samuels recommends that runners living in cold climates get their levels checked with a blood test prior to spring training season.How to get it: Three ounces of salmon packs about 450 IU. Other sources: Egg yolks, milk, and some mushrooms (certain brands are grown in a way that increases their vitamin D content).

Use it for: Maintaining a healthy weight, staying regular, regulating blood sugar, and lowering cholesterol.How much? Men, 38 grams/day; women, 25 grams/day. "Most of my runners eat half of what they need in a day," says Dorfman. Though prior to a race, go easy on the fiber-rich foods, which can cause GI trouble.How to get it: 1 cup of raspberries offers 8 grams of fiber. Other sources: beans, whole grains.

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IronUse it for: Powering up muscles. "Iron transports oxygen in the blood and muscle," says Samuels. "If you experience a decline in performance and feel exhausted more than usual, get a blood test to check your iron levels."How much? Men, 8 milligrams/day; women, 18 milligrams/day. If your doctor finds you have low iron levels, he or she will put you on the appropriate supplement. (Translation: don't take supplements on your own.)How to get it: A ½ cup of lentils supplies 3 milligrams of iron. Other sources: red meat, dark meat poultry, and fortified cereals.

MagnesiumUse it for: Improving your ability to tackle a run. Magnesium does it all, creating 300 biochemical reactions in the body. One of the most important: its role in energy metabolism, says Samuels. "Magnesium is particularly important during a strenuous training session."How much? Men, 400 milligrams/day; women, 310 milligrams/day. "Seven out of 10 people are deficient. If someone says 'I'm tired,' I consider they may be running low," says Dorfman. Supplementing can cause side effects like diarrhea, so aim to eat more natural food sources of the mineral.How to get it: One ounce of pumpkin seeds provides nearly one-fifth of your quota. Other sources: Swiss chard, beans.

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Omega-3

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Use it for: Postexercise recovery. "Omega-3s have been shown to reduce inflammation after a run, which can improve tissue repair and reduce muscle pain," says Samuels. Other research has shown it can help prevent exercise-induced asthma.How much? Samuels recommends men and women eating an omega-3-rich food every other day, aiming for at least 500 milligrams. If you don't often hit that mark, consider supplementing with a fish oil supplement or algae-based supplement if you are vegetarian or vegan, she advises.How to get it: One can of sardines packs nearly 1,400 milligrams of omega-3s. Other sources: salmon, arctic char, omega 3-fortified foods like juices and eggs.

PotassiumUse it for: Hydration and maintaining proper muscle function. "Along with sodium, this is the most important electrolyte. Potassium helps your muscles contract and relax, and contributes to fluid balance in your body," says Samuels.How much? 4.7 grams/day (men and women).How to get it: One baked potato offers 17% of your daily value. Other sources: yogurt, dried fruit, bananas.

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SeleniumUse it for: Antioxidant power that may ease postexercise oxidative cell damage, maintaining thyroid function (and low thyroid levels can usher in fatigue), and regulating metabolism.How Much? 55 micrograms/day (men and women).How to get it: The easy way is to eat one Brazil nut, which supplies 137% of your daily value. Other sources: Orange juice, whole grains

SodiumUse it for: Helps your body maintain proper fluid and electrolyte balance, says Dorfman. "It will also prevent muscle cramps if you are a heavy sweater or out on a hot run," she says.How Much? Men and women should limit intake to 2,300 milligrams/day; 1,500 milligrams/day or less if you have high blood pressure. Dorfman recommends against taking sodium tablets.How to get it: Typically you don't need to seek out sodium since most of us get more than enough in our diet. But after a particularly sweaty run, it's good to eat (or drink) foods higher in sodium to replenish losses. Bread, cheese, chicken, and sports drinks all contain the electrolyte. Three ounces of deli turkey can pack up to 1,050 milligrams.

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